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(No Model.)

C. COERPER. ELECTRIC RAILWAY SYSTEM, ne.v

No. 562,216. Patented June 16, 1896.

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UNITED STATES PATENT OFFICE.

CARL COERPER, OF COLOGNE, GERMANY.

ELECTRIC-RAILWAY SYSTEM, 80G.

SPECIFICATION forming part of Letters Patent No. 562,216, dated J une16, 1896.

Application led April 4, 1896. Serial No. 586,158. (No model.)

To all wiz/0m it may concern,.-

Be it known that I, CARL COERPER, a citizen of the German Empire, andaresident of Cologne, in said Empire of Germany, have invented certainnew and useful Improvements in Electric-Railway Systems withTransformers and Secondary Conductors, of which the following is aspecification.

This invention relates to an improved electric-railway system withtransformers and secondary conductors.

In electric railways with secondary conductors in which the current issupplied by means of transformers of any approved conr struction withstationary or rotary windings, it is required for economical reasons toswitch the transformers into circuit, as they are necessary forsupplying the required current to a car as it moves over the secondaryconductors. This object is obtained by arranging the individualsecondary conductors so that they overlie each other at their points ofconnection in such a manner that the overlapping ends of the secondaryconductors are coupled parallel with each other by the contacts whichserve for transmitting the current to the car. In this manner a portionof the secondary transformer-current is transmitted from the secondaryconductor into the secondary transformer-circuit of the adjacentsecondary conductors. The second transformer, however, will receive onlyso much current as is necessary for its magnetization. In the secondarycircuit of this transformer is located a magneto-electric switch device,which when the transformer is magnetized is called into action, so as toclose the primary circuit of the transformer. By the closing of theprimary current the transformer which belongs to the respectivesecondary conductors is called into action and supplies, at first, aportion, and, finally, the entire quantity of the required current tothe car, as soon as the same has moved onto the corresponding secondaryconductors. On the other hand, the action of the transformer of theadjacent secondary conductors is discontinued as soon as the contactdevices on the car leave the overlapping sections of the secondaryconductors, so that the magneto-electric switch device is placed out ofaction and interrupts thereby the supply of primary current to thetransformer.

In the accompanying drawing, a diagram of my improved electric-railwaysystem is shown, in which the overlapping portions of the secondaryconductors are shown at the lower part of the figure, while theconductors for the primary current are shown at the upper part of thesame. The transformers, as well as the magneto-electric switch devicesfor supplying or discontinuing the primary and secondary currents, arearranged intermediately between the secondary conductors and the primaryconductors.

I do not desire to claim any special construction of themagneto-electric switch devices for closing and interrupting the primarycurrent, as any approved construction may be used for this purpose, thedevice shown in the drawing being merely intended to give a diagrammaticrepresentation of the same.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- An electric-railway system, consisting of primaryconductors, overlapping secondary conductors, transformers interposedbetween the main and secondary conductors, and magneto-electric switchdevices, by which the primary windings of the transformers areautomatically switched in as soon as the contacts on the car connect theoverlapping portions of two adjacent conductors parallel with eachother, and by which the primary windings of the transformers arelikewise automatically cut out as soon as no further current is requiredon the adjacent secondary conductors, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing witnesses.

CARL COERPER.

Witnesses:

CLARENCE P. FELDMANN, A. AsHAUER.

